Evaluation of the Brief Adjustment Scale–6 (BASE-6): A measure of general psychological adjustment for measurement-based care.

Abstract

The current study evaluated the Brief Adjustment Scale-6 (BASE-6), a measure of general psychological adjustment. The psychometric properties of the BASE-6 are documented using 3 adult samples, including online participants (Sample 1: n ϭ 459), college students (Sample 2: n ϭ 244), and a clinical sample (Sample 3: n ϭ 296). Acceptability ratings comparing the BASE-6 to the Outcome Questionnaire-45.2 (OQ-45.2; Lambert et al., 1996) are provided. Factor analyses showed the items were well represented by a single factor, indicating a unidimensional factor structure. The BASE-6 demonstrated good internal consistency (␣ ϭ .87-.93) and there was good test-retest reliability (intraclass correlation ϭ .77) across 1 week. In Samples 1 and 2, there was moderate to high convergent validity with the OQ-45.2 total score (r ϭ .66 -.81, p Ͻ .001), and Symptom Distress (r ϭ .66 -.80, p Ͻ .001), Interpersonal (r ϭ .54 -.68, p Ͻ .001), and Social Role (r ϭ .57-.69, p Ͻ .001) subscales. In Sample 3, there was high convergent validity with the Patient Health Questionnaire-9 (r ϭ .80, p Ͻ .001) and the Generalized Anxiety Disorder-7 (r ϭ .76, p Ͻ .001). BASE-6 item and total scores were generally higher in the clinical sample compared with the nonclinical samples. Participants perceived the BASE-6 as easier to use, and more acceptable on a weekly basis compared with the OQ-45.2. Results provide preliminary evidence that the BASE-6 has acceptable psychometric properties and may show promise in the context of measurement-based care.

Psychological Effects of the COVID-19 Imposed Lockdown on Adults with Attention Deficit/Hyperactivity Disorder: Cross-Sectional Survey Study

“…In terms of the level of psychological adjustment in 1 week, before we contacted our sample, their mean BASE-6 score was 17.13 (SD 9.56), which was similar to the clinical sample (mean 18.9, SD 7.0) and college student sample (mean 18.1 SD 6.8) scores reported during the evaluation of the BASE-6 [15]. However, it should be noted that the clinical and college student sample scores were reported outside of a pandemic context.…”

“…For the people who did respond to the telephone call, after the purpose of the well-being survey was explained using a predetermined script, the Patient Health Questionnaire-9 (PHQ-9) [13], Generalized Anxiety Disorder Scale-7 (GAD-7) [14], Brief Adjustment Scale-6 (BASE-6) [15], Perceived Stress Scale (PSS) [16], and Multidimensional Scale of Perceived Social Support (MSPSS) [17] were administered.…”

Loneliness, college belongingness, subjective vitality, and psychological adjustment during coronavirus pandemic: Development of the College Belongingness Questionnaire

“…Students' psychological adjustment was assessed using the BASE, a 6-item self-report instrument (e.g., "To what extent have you felt tense, anxious, and/or afraid this week? "), scored using a 7-point scale ranging from 1 = not at all to 5 = extremely (Cruz et al, 2020). Yıldırım & Solmaz (2020b) examined the psychometric properties of the Turkish version of the scale, showing that the measure had a strong internal reliability estimate (α = .88).…”

Acceptance and Commitment Therapy for Adults with ADHD during COVID-19: An Open Trial

“…The BASE-6 comprises six questions rated out of 7 on the basis of severity. This rating scale was developed for session by session outcome measurement and has excellent internal consistency (a = 0.87 -0.92) and reasonable test-retest reliability (0.76) based on a comprehensive sample including clinical and non-clinical populations [16].…”